(Please HELPP, ill give brainiest) What caused the rapid decline in the Navajo language being taught in the elementary school?

Because the navajo languages are only spoken but never written.

To keep language on and on you need people to speak it, and people to remember it. However, from my memory, the number of navajo tribes arent much and the language is pretty hard to learn since it is only a spokent language, so there are no written records for it.

c. "but thy eternal summer shall not fade" (line 9)